Joints and Functions of the Skeletal System

Joints

• Also known as articulations

• Defined as locations where bones meet

Types of Joints

• There are three primary types of joints based on their mobility:

  • Fibrous Joints (Not moveable)

  • Example: Cranium (Skull)

  • Cartilaginous Joints (Slightly moveable)

  • Example: Vertebrae

  • Synovial Joints (Fluid-filled and allow for most movement)

Functions of the Skeletal System

• Support: Provides a framework for the body and maintains its shape.

• Protection: Shields vital organs from injury.

• Movement: Facilitates movement by serving as attachment points for muscles.

• Storage: Stores minerals such as calcium and phosphorus.

• Hematopoiesis: Production of blood cells within the bone marrow.

Fontanels

• Refers to soft spots in infants' skulls, allowing for growth and movement during birth.

• Osification: The process of converting cartilage into bone.

  • Key Cells:

    • Osteoblasts: Cells that build bone.

    • Osteoclasts: Cells that destroy bone.

Disorders of the Skeletal System

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